Display screen or a portion thereof with graphical user interface



FIG. 1 is a view of a display screen or a portion thereof with graphical user interface; and,

FIG. 2 is a view of a second embodiment thereof.

The outer broken line represents a display screen or a portion thereof and forms no part of the claimed design. The broken line showing of the remainder of the graphical user interface forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or a portion thereof with graphical user interface, as shown and described. 